The left-hander can’t count on that happening in Tuesday night’s series opener against the visiting Houston Astros considering the way the Giants have struggled at the plate.

Looking to win a second straight start after going 0-3 with a 4.33 ERA in his previous four, Bumgarner (7-4, 3.26 ERA) came out on top in Wednesday’s 6-5 win in San Diego.

“I didn’t throw very well,” Bumgarner said after walking a career high-tying four in six innings. “Defense picked me up and offense picked me up, too.”

Bumgarner is 4-1 with a 2.50 ERA in five home starts, but the Giants (34-27) open this series after batting .188 and scoring five runs while dropping two of three to AL West-leading Texas over the weekend.

Both losses were by 5-0 margins after the Giants, who have won 10 of 14, had not been shut out all season heading into the series.

The Astros (26-34) are among the worst road teams in the majors at 8-20, but they scored 20 runs over the weekend while taking two of three from the Chicago White Sox to begin their nine-game trip.

“It was huge to be able to put up that many home runs (a season-high four) and get our first road (series) win,” said manager Brad Mills, whose team won 11-9 on Sunday to improve to 4-3 since a season-high eight-game skid.

Astros shortstop Jed Lowrie will look to keep his hot streak going after hitting three of his team-leading 12 homers in the last four contests.

So will first baseman Brett Wallace, who is batting .400 (10 for 25) with two homers and four RBIs while hitting safely in all seven games since getting called up from Triple-A Oklahoma City on June 3.

Tuesday’s scheduled starter Bud Norris (5-3, 4.65) will get his second look at San Francisco after going seven strong innings in a 4-3, 11-inning road win Aug. 28.